Subject
Quantitative Aptitude
Topic
Number
Which of the following is not a real number?
Which of the following is not a real number?
ক)
√4খ)
-πগ)
0/5ঘ)
√-9Explanation
*√4: এটি একটি real number। √4 = 2, যা একটি পূর্ণ সংখ্যা এবং real number। *π: এটিও একটি real number। π একটি irrational number, এবং তার ঋণাত্মক মানও real number। *0/5: এটি একটি real number। যেকোনো সংখ্যাকে 0 দিয়ে ভাগ করলে উত্তর 0 হয়, যা একটি real number। *√-9: এটি একটি real number নয়। ঋণাত্মক সংখ্যার বর্গমূল বাস্তব সংখ্যা ক্ষেত্রে সংজ্ঞায়িত নয়। এটি একটি imaginary number। *সুতরাং, সঠিক উত্তর হল (D) √-9।Related questions
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